J. D. Dana on Currents of the Ocean. 2338 
is little above 80° F., while that of the parallel} of & 
as 40° F., so that the former is 12° F. above 65° By a 
28° F. below it. And hence unless the waters of 
ers.do thus strikingly 
ey res. But little, if at all, is this the case with the South 
Well as that better known along North America,) it is not 
€quator along western Africa can have accessions from | - 
South, as such waters would press against stan a GES : ro 
they do make themselves apparent. : ae main supply is in the 
My object here 
On currents, but : 
uitherto been done, the argumen oe | 
“Ocean itself with regard to the grander points in the system ce 
Oceanic movements. The fact that the chart is a win one : 
each ocean, does not affect the argument. 
